I have compiled pymol on linux with icc (Intel's compiler), and it works wonderfully. You simply need to make sure that you set CC=icc -I<path to Intel's includes>
I also had to make a directory in the pymol directory called intel_includes to which I needed to copy float.h from Intel's substitute_headers directory. Then of course, you need to add -I<pymol_path>/intell_includes to CC. I have not attempted to compile the extras pymol needs without gcc. So, python and all the rest are compiled with gcc. Even so, I've noticed a substantial speed improvement. As far as the cards go, I don't know which offers better performance. I'm currently running on a Quadro 2, at pymol has good performance, but I don't know about a GeForce 3. Tony Hill Iowa State University